塔里木河流域生态系统碳储量的情景预测分析

doi:10.12118/j.issn.1000－6060.2023.274

Abstract

Abstract:

Land use patterns are important factors causing carbon stock changes in terrestrial ecosystems and play a critical role in maintaining the stability of carbon stock levels. This study uses the coupled PLUS-InVEST model to assess and predict land use and carbon stock changes in the Tarim River Basin, Xinjiang, China from 1980 to 2020. Four scenarios of natural development, ecological protection, arable land protection, and urban development were established. The land use and carbon stock trends in the study area in 2030 were predicted by scenarios, and the effects of land use changes on carbon stock were investigated. The results are as follows: (1) The area of cultivated land, construction land, and unutilized land in the Tarim River Basin increased significantly during the 40-a period, whereas the area of forest land, grassland, and water decreased. (2) Carbon stock exhibited an overall upward trend from 1980 to 2020, with an overall increase of 22.66×10⁶ t. The area of carbon stock increase was mainly distributed on the main stream of the Tarim River and its branches during the 40-a period. Unutilized land and grassland are the main carbon reservoirs in the Tarim River Basin, accounting for 24.77% and 19.37% of the total carbon stock, respectively. (3) The different scenarios showed that the loss of carbon stock after 2020 was larger and the rate of loss gradually accelerated, the carbon stock reduction area was mainly distributed in the middle and southwest parts of the study area, and the transfer of grassland to unutilized land and forest land to grassland in the future was the main reason for carbon stock loss. The carbon stock loss under the four scenarios was reduced by 0.0475×10⁸ t, 0.0051×10⁸ t, 0.0285×10⁸ t and 0.0473×10⁸ t, respectively. (4) The transfer of cropland to woodland, grassland to woodland, watershed to grassland and unutilized land, and unutilized land to cropland and grassland are conducive to carbon storage. Therefore, in future planning, we should combine arable land and ecological protection, control the expansion of construction land to the outside while ensuring the growth of the local economy, increase carbon storage, and build up the strength to achieve the carbon peaking and carbon neutrality goals.

Key words: Tarim River Basin, land use, carbon stock, PLUS model, InVEST model, Xinjiang

FU Wei, XIA Wenhao, FAN Tongsheng, ZOU Zhen, HUO Yu. Scenario projection analysis of ecosystem carbon stocks in the Tarim River Basin[J].Arid Land Geography, 2024, 47(4): 634-647.

Figures/Tables 15

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Tab. 9

Changes in carbon reserves caused by land use change from 1980 to 2020 /106 t"

转换类型	地上生物量碳储量	地下生物量碳储量	土壤碳储量	死亡有机物碳储量	总碳储量
耕地→林地	3.4991	0.7096	3.6700	0.1295	8.0082
耕地→草地	-0.4314	0.1512	-0.1791	-0.1525	-0.6118
耕地→水域	-0.0559	-0.0740	-1.7823	-0.0256	-1.9378
耕地→建设用地	-0.2093	-0.3145	-11.3690	-0.1635	-12.0563
耕地→未利用地	-0.1390	-0.1464	-2.0337	-0.0589	-2.3781
小计	2.6634	0.3259	-11.6941	-0.2709	-8.9758
林地→耕地	-6.2481	-1.2671	-6.5533	-0.2313	-14.2999
林地→草地	-19.7664	-3.1410	-19.7380	-1.2278	-43.8733
林地→水域	-0.9380	-0.2687	-3.1442	-0.0643	-4.4152
林地→建设用地	-0.2040	-0.0534	-0.7055	-0.0144	-0.9773
林地→未利用地	-5.1821	-1.4052	-11.0918	-0.3528	-18.0319
小计	-32.3386	-6.1354	-41.2329	-1.8907	-81.5975
草地→耕地	4.2023	-1.4726	1.7444	1.4849	5.9590
草地→林地	23.0356	3.6605	23.0025	1.4309	51.1295
草地→水域	0.0486	-1.2327	-22.8375	-0.0591	-24.0806
草地→建设用地	0.0426	-0.1114	-2.7890	-0.0072	-2.8650
草地→未利用地	-0.3195	-31.8215	-323.4689	-1.7094	-357.3192
小计	27.0097	-30.9777	-324.3484	1.1402	-327.1763
水域→耕地	0.1132	0.1496	3.6058	0.0519	3.9204
水域→林地	0.8038	0.2303	2.6943	0.0551	3.7834
水域→草地	-0.1306	3.3137	61.3911	0.1589	64.7330
水域→建设用地	0.0010	0.0011	0.0000	0.0000	0.0021
水域→未利用地	-0.3083	0.6851	60.2365	0.0000	60.6133
小计	0.4790	4.3797	127.9277	0.2658	133.0522
建设用地→耕地	0.1485	0.2231	8.0658	0.1160	8.5535
建设用地→林地	0.3180	0.0832	1.0998	0.0225	1.5234
建设用地→草地	-0.0081	0.0212	0.5302	0.0014	0.5447
建设用地→水域	-0.0010	-0.0010	0.0000	0.0000	-0.0020
建设用地→未利用地	-0.0038	-0.0020	0.1246	0.0000	0.1187
小计	0.4535	0.3244	9.8204	0.1399	10.7382
未利用地→耕地	1.3583	1.4308	19.8711	0.5753	23.2356
未利用地→林地	4.2485	1.1520	9.0934	0.2893	14.7832
未利用地→草地	0.2498	24.8838	252.9471	1.3367	279.4175
未利用地→水域	0.0935	-0.2078	-18.2732	0.0000	-18.3875
未利用地→建设用地	0.0784	0.0409	-2.5377	0.0000	-2.4184
小计	6.0286	27.2998	261.1008	2.2013	296.6304
总计	4.2956	-4.7832	21.5736	1.5855	22.6713

Tab. 9

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类型	名称	分辨率/m	数据来源
基础数据	土地利用数据	30	中国科学院资源环境科学与数据中心（http://www.resdc.cn）
自然条件	土壤类型	1000	HWSD世界土壤数据库（http://westdc.westgis.ac.cn/）
	年平均气温	1000	中国气象数据网（htpp://www.nmic.cn）中国气象数据网（htpp://www.nmic.cn）
	年降水量	1000	中国气象数据网（htpp://www.nmic.cn）中国气象数据网（htpp://www.nmic.cn）
	DEM	30	地理空间数据云（http://www.gscloud.cn）
	坡度	30	对DEM进行坡度分析
社会经济	人口	1000	中国科学院资源环境科学与数据中心（http://www.resdc.cn）中国科学院资源环境科学与数据中心（http://www.resdc.cn）
社会经济	GDP	1000
交通区位	距一级道路距离	30 30 30 30 30 30 30	OpenstreetMap（http://www.openstreetmap.org/） OpenstreetMap（http://www.openstreetmap.org/） OpenstreetMap（http://www.openstreetmap.org/） OpenstreetMap（http://www.openstreetmap.org/） OpenstreetMap（http://www.openstreetmap.org/）
	距二级道路距离
	距三级道路距离
	距高速公路距离
	距铁路距离
	距火车站距离		国家基础地理信息中心（http://www.ngcc.cn）国家基础地理信息中心（http://www.ngcc.cn）
	邻近城市驻地距离

土地利用类型	地上碳密度	地下碳密度	土壤碳密度	死亡有机物碳密度	参考文献
耕地	3.4705	4.1202	86.2150	1.24	王绮等^[31]，颜安^[33]
林地	36.9664	10.9131	121.3471	2.48	颜安^[33]
草地	0.5839	5.1317	85.0168	0.22	周圣杰^[32]，颜安^[33]
水域	0.7648	0.5428	0.0000	0.00	颜安^[33]
建设用地	1.8833	1.7352	0.0000	0.00	周圣杰^[32]，颜安^[33]
未利用地	0.5428	1.0362	43.3855	0.00	颜安^[33]

土地利用类型	1980年	1990年	2000年	2010年	2020年
耕地	24541.47	24531.84	26750.16	35998.74	42418.44
林地	12886.38	12911.49	13546.80	12912.57	12703.50
草地	254001.87	254204.28	246313.89	233091.90	227369.97
水域	36360.81	36106.74	36823.77	21688.11	21978.72
建设用地	1517.13	1555.38	1497.15	3628.89	2689.92
未利用地	565992.18	565990.11	570368.07	587979.63	588139.29

土地利用类型	1980— 1990年	1990— 2000年	2000— 2010年	2010— 2020年
耕地	-0.0039	0.9043	3.4574	1.7833
林地	0.0195	0.4921	-0.4682	-0.1619
草地	0.0080	-0.3104	-0.5368	-0.2455
水域	-0.0699	0.1986	-4.1103	0.1340
建设用地	0.2521	-0.3744	14.2387	-2.5875
未利用地	0.0000	0.0774	0.3088	0.0027

1980年	2020年							转出
1980年	耕地	林地	草地	水域	建设用地	未利用地	总和	转出
耕地	20001.96	1044.63	1494.63	206.73	1318.68	474.84	24541.47	4539.51
林地	1865.34	3848.31	5432.76	259.11	58.14	1422.72	12886.38	9038.07
草地	14557.77	6331.50	152400.24	2686.14	328.05	77698.17	254001.87	101601.63
水域	418.23	222.03	7221.06	14606.46	9.00	13884.03	36360.81	21754.35
建设用地	935.55	90.63	62.37	8.73	391.14	28.71	1517.13	581.58
未利用地	4639.59	1166.40	60758.91	4211.55	584.91	494630.82	565992.18	71361.36
总和	42418.44	12703.50	227369.97	21978.72	2689.92	588139.29	895299.84	-
转入	22416.48	8855.19	74969.73	7372.26	2298.78	93508.47	-	209148.70

Scenario projection analysis of ecosystem carbon stocks in the Tarim River Basin

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情景	土地利用类型	耕地	林地	草地	水域	建设用地	未利用地
自然增长	耕地	1	1	1	1	1	1
	林地	1	1	1	1	1	1
	草地	1	1	1	1	1	1
	水域	1	1	1	1	1	1
	建设用地	0	0	0	0	1	0
	未利用地	1	1	1	1	1	1
耕地保护	耕地	1	0	0	0	0	0
	林地	1	1	1	0	1	1
	草地	1	1	1	1	1	1
	水域	1	0	1	1	1	1
	建设用地	0	0	0	0	1	0
	未利用地	1	1	1	1	1	1
生态保护	耕地	1	1	1	1	1	1
	林地	0	1	0	0	0	0
	草地	0	1	1	1	0	0
	水域	0	0	0	1	0	0
	建设用地	0	0	0	0	1	0
	未利用地	1	1	1	1	1	1
城镇发展	耕地	1	0	0	0	1	0
	林地	1	1	1	0	1	1
	草地	1	1	1	1	1	1
	水域	1	1	1	1	0	1
	建设用地	0	0	0	0	1	0
	未利用地	1	1	1	0	1	1

土地利用类型	情景
土地利用类型	自然发展	耕地保护	生态保护	城镇发展
耕地	47615.40	48078.45	40689.54	47617.20
林地	12510.36	12510.36	13342.32	12510.36
草地	221893.29	221893.20	227759.58	221893.29
水域	22255.11	22255.11	22255.11	22255.11
建设用地	3158.91	2695.95	3386.52	3157.11
未利用地	587866.77	587866.77	587866.77	587866.77

年份	耕地	林地	草地	水域	建设用地	未利用地	总计
1980年	2.3326	2.2127	23.1022	0.0475	0.0055	25.4497	53.1502
1990年	2.3316	2.2170	23.1205	0.0472	0.0056	25.4496	53.1715
2000年	2.5425	2.3261	22.4028	0.0482	0.0054	25.6464	52.9714
2010年	3.4216	2.2172	21.2003	0.0284	0.0131	26.4384	53.3190
2020年	4.0317	2.1813	20.6799	0.0287	0.0097	26.4455	53.3768
2030年自然发展情景	4.5257	2.1481	20.1818	0.0291	0.0114	26.4332	53.3293
2030年耕地保护情景	4.5697	2.1481	20.1818	0.0291	0.0098	26.4332	53.3717
2030年生态保护情景	3.8674	2.2910	20.7153	0.0291	0.0123	26.4332	53.3483
2030年城镇发展情景	4.5259	2.1481	20.1818	0.0291	0.0114	26.4332	53.3295

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